[Sheriff] Disable blink test.

The test
virtual/form-controls-refresh-disabled/fast/forms/autofocus-opera-008.html
is failing on Mac10.11 Tests build.

BUG=1058754,1058203

TBR=tkent@chromium.org

Change-Id: I90c794db04f92713b6f59d12e332dbfdda8b40aa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2089560
Commit-Queue: Maggie Cai <mxcai@chromium.org>
Reviewed-by: Maggie Cai <mxcai@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747604}

third_party/blink/web_tests/TestExpectations

@@ -6761,3 +6761,6 @@ crbug.com/1058203 [ Mac10.10 ] virtual/form-controls-refresh-disabled/fast/forms
 crbug.com/1058073 [ Retina ] virtual/threaded/fast/scroll-snap/snap-to-target-on-layout-change.html [ Pass Failure ]
 crbug.com/1058073 [ Mac10.14 ] accessibility/content-changed-notification-causes-crash.html [ Pass Failure ]
 crbug.com/1058073 [ Retina ] accessibility/content-changed-notification-causes-crash.html [ Pass Failure ]
+
+# Sheriff 2020-03-06
+crbug.com/1058203 [ Mac10.11 ] virtual/form-controls-refresh-disabled/fast/forms/autofocus-opera-008.html [ Pass Failure ]